Hydrogen internal friction peak and hydrogen induced structural relaxation in amorphous Cu{sub 60}Zr{sub 40}
- Univ. of Tsukuba, Ibaraki (Japan). Inst. of Materials Science
Hydrogen internal friction peaks (HIFP) and hydrogen thermal desorption (HTD) for amorphous (a-) Cu{sub 60}Zr{sub 40} were investigated. The hydrogen concentration (C{sub H}) dependence of the relaxation strength of HIFP suggests that hydrogen occupies the tetrahedral sites under the nearest neighbor blocking. HIFP is found to be composed of seven constituent peaks, suggesting that in a-Cu{sub 60}Zr{sub 40}, there exist seven representative atomic structures which can be distinguishable by the activation energy of hydrogen migration. These features are very similar to those reported for a-Cu{sub 50}Ti{sub 50} and a-Cu{sub 50}Zr{sub 50}, indicating that they reflect the common characteristics of the a-alloys. The results of HTD show that the hydrogen induced structural relaxation (HISR) proceeds at room temperature for C{sub H} above 7 and 17 at.%, and the onset temperature, T{sub x,s}, for the precipitation of ZrH{sub 2} decreases linearly with C{sub H,R} remaining in the specimens at T{sub x,s}. These results are discussed in the view of the effect of volume expansion on the stability of the a-alloys.
- OSTI ID:
- 31728
- Journal Information:
- Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 3 Vol. 43; ISSN AMATEB; ISSN 0956-7151
- Country of Publication:
- United States
- Language:
- English
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